Audio speaker

Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Speaker or housing therefor

Patent

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Details

D14204, 1401

Patent

active

D03971171

REFERENCES:
patent: D180912 (1957-09-01), Mossington
patent: D220629 (1971-05-01), Shimizu
patent: D250262 (1978-11-01), Philips
patent: D270444 (1983-09-01), Matsuda et al.
patent: 5552569 (1996-09-01), Sapkowski

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